diff --git a/pipenv/vendor/pip9/__init__.py b/pipenv/vendor/pip9/__init__.py
index 238d7914..4e3e5300 100644
--- a/pipenv/vendor/pip9/__init__.py
+++ b/pipenv/vendor/pip9/__init__.py
@@ -17,7 +17,7 @@ import re
 # the stderr output) and is just plain annoying in normal usage.  I don't want
 # to add socks as yet another dependency for pip, nor do I want to allow-stder
 # in the DEP-8 tests, so just suppress the warning.  pdb tells me this has to
-# be done before the import of pip.vcs.
+# be done before the import of pip9.vcs.
 from pip9._vendor.urllib3.exceptions import DependencyWarning
 warnings.filterwarnings("ignore", category=DependencyWarning)  # noqa
 
@@ -55,7 +55,7 @@ from pip9._vendor.urllib3.exceptions import InsecureRequestWarning
 # initialising the pip module, "from pip9 import cmdoptions" is recursive
 # and appears not to work properly in that situation.
 import pip9.cmdoptions
-cmdoptions = pip.cmdoptions
+cmdoptions = pip9.cmdoptions
 
 # The version as used in the setup.py and the docs conf.py
 __version__ = "9.0.3"
@@ -238,7 +238,7 @@ def main(args=None):
         sys.exit(1)
 
     # Needed for locale.getpreferredencoding(False) to work
-    # in pip.utils.encoding.auto_decode
+    # in pip9.utils.encoding.auto_decode
     try:
         locale.setlocale(locale.LC_ALL, '')
     except locale.Error as e:
diff --git a/pipenv/vendor/pip9/_vendor/__init__.py b/pipenv/vendor/pip9/_vendor/__init__.py
index aa903156..efe4f536 100644
--- a/pipenv/vendor/pip9/_vendor/__init__.py
+++ b/pipenv/vendor/pip9/_vendor/__init__.py
@@ -2,7 +2,7 @@
 pip._vendor is for vendoring dependencies of pip to prevent needing pip to
 depend on something external.
 
-Files inside of pip._vendor should be considered immutable and should only be
+Files inside of pip9._vendor should be considered immutable and should only be
 updated to versions from upstream.
 """
 from __future__ import absolute_import
@@ -13,7 +13,7 @@ import sys
 
 # Downstream redistributors which have debundled our dependencies should also
 # patch this value to be true. This will trigger the additional patching
-# to cause things like "six" to be available as pip.
+# to cause things like "six" to be available as pip9.
 DEBUNDLED = False
 
 # By default, look in this directory for a bunch of .whl files which we will
diff --git a/pipenv/vendor/pip9/_vendor/re-vendor.py b/pipenv/vendor/pip9/_vendor/re-vendor.py
index 82c4ef0f..5841a2ff 100644
--- a/pipenv/vendor/pip9/_vendor/re-vendor.py
+++ b/pipenv/vendor/pip9/_vendor/re-vendor.py
@@ -19,7 +19,7 @@ def clean():
     os.unlink(os.path.join(here, 'six.py'))
 
 def vendor():
-    pip.main(['install', '-t', here, '-r', 'vendor.txt'])
+    pip9.main(['install', '-t', here, '-r', 'vendor.txt'])
     for dirname in glob.glob('*.egg-info'):
         shutil.rmtree(dirname)
 
diff --git a/pipenv/vendor/pip9/basecommand.py b/pipenv/vendor/pip9/basecommand.py
index 9c4117c0..9c8610f1 100644
--- a/pipenv/vendor/pip9/basecommand.py
+++ b/pipenv/vendor/pip9/basecommand.py
@@ -169,7 +169,7 @@ class Command(object):
                 ])),
             },
             # Disable any logging besides WARNING unless we have DEBUG level
-            # logging enabled. These use both pip._vendor and the bare names
+            # logging enabled. These use both pip9._vendor and the bare names
             # for the case where someone unbundles our libraries.
             "loggers": dict(
                 (
diff --git a/pipenv/vendor/pip9/commands/freeze.py b/pipenv/vendor/pip9/commands/freeze.py
index c93c7c14..5a6deb9e 100644
--- a/pipenv/vendor/pip9/commands/freeze.py
+++ b/pipenv/vendor/pip9/commands/freeze.py
@@ -67,7 +67,7 @@ class FreezeCommand(Command):
         self.parser.insert_option_group(0, self.cmd_opts)
 
     def run(self, options, args):
-        format_control = pip.index.FormatControl(set(), set())
+        format_control = pip9.index.FormatControl(set(), set())
         wheel_cache = WheelCache(options.cache_dir, format_control)
         skip = set(stdlib_pkgs)
         if not options.freeze_all:
diff --git a/pipenv/vendor/pip9/commands/help.py b/pipenv/vendor/pip9/commands/help.py
index 702d62af..0c6bf171 100644
--- a/pipenv/vendor/pip9/commands/help.py
+++ b/pipenv/vendor/pip9/commands/help.py
@@ -15,7 +15,7 @@ class HelpCommand(Command):
         from pip9.commands import commands_dict, get_similar_commands
 
         try:
-            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            # 'pip help' with no args is handled by pip9.__init__.parseopt()
             cmd_name = args[0]  # the command we need help for
         except IndexError:
             return SUCCESS
diff --git a/pipenv/vendor/pip9/commands/list.py b/pipenv/vendor/pip9/commands/list.py
index 1a1e601f..9f36140e 100644
--- a/pipenv/vendor/pip9/commands/list.py
+++ b/pipenv/vendor/pip9/commands/list.py
@@ -138,7 +138,7 @@ class ListCommand(Command):
             warnings.warn(
                 "The default format will switch to columns in the future. "
                 "You can use --format=(legacy|columns) (or define a "
-                "format=(legacy|columns) in your pip.conf under the [list] "
+                "format=(legacy|columns) in your pip9.conf under the [list] "
                 "section) to disable this warning.",
                 RemovedInPip10Warning,
             )
diff --git a/pipenv/vendor/pip9/commands/uninstall.py b/pipenv/vendor/pip9/commands/uninstall.py
index 8e5eacb2..03465821 100644
--- a/pipenv/vendor/pip9/commands/uninstall.py
+++ b/pipenv/vendor/pip9/commands/uninstall.py
@@ -44,7 +44,7 @@ class UninstallCommand(Command):
 
     def run(self, options, args):
         with self._build_session(options) as session:
-            format_control = pip.index.FormatControl(set(), set())
+            format_control = pip9.index.FormatControl(set(), set())
             wheel_cache = WheelCache(options.cache_dir, format_control)
             requirement_set = RequirementSet(
                 build_dir=None,
diff --git a/pipenv/vendor/pip9/download.py b/pipenv/vendor/pip9/download.py
index 546c7920..b2127982 100644
--- a/pipenv/vendor/pip9/download.py
+++ b/pipenv/vendor/pip9/download.py
@@ -65,7 +65,7 @@ def user_agent():
     Return a string representing the user agent.
     """
     data = {
-        "installer": {"name": "pip", "version": pip.__version__},
+        "installer": {"name": "pip", "version": pip9.__version__},
         "python": platform.python_version(),
         "implementation": {
             "name": platform.python_implementation(),
@@ -251,7 +251,7 @@ class SafeFileCache(FileCache):
         super(SafeFileCache, self).__init__(*args, **kwargs)
 
         # Check to ensure that the directory containing our cache directory
-        # is owned by the user current executing pip. If it does not exist
+        # is owned by the user current executing pip9. If it does not exist
         # we will check the parent directory until we find one that does exist.
         # If it is not owned by the user executing pip then we will disable
         # the cache and log a warning.
diff --git a/pipenv/vendor/pip9/locations.py b/pipenv/vendor/pip9/locations.py
index 868ab6ec..e635dd91 100644
--- a/pipenv/vendor/pip9/locations.py
+++ b/pipenv/vendor/pip9/locations.py
@@ -19,7 +19,7 @@ USER_CACHE_DIR = appdirs.user_cache_dir("pip")
 
 DELETE_MARKER_MESSAGE = '''\
 This file is placed here by pip to indicate the source was put
-here by pip.
+here by pip9.
 
 Once this package is successfully installed this source code will be
 deleted (unless you remove this file).
diff --git a/pipenv/vendor/pip9/operations/freeze.py b/pipenv/vendor/pip9/operations/freeze.py
index 7cc32add..5e9c6ea9 100644
--- a/pipenv/vendor/pip9/operations/freeze.py
+++ b/pipenv/vendor/pip9/operations/freeze.py
@@ -45,7 +45,7 @@ def freeze(
                                             skip=(),
                                             user_only=user_only):
         try:
-            req = pip.FrozenRequirement.from_dist(
+            req = pip9.FrozenRequirement.from_dist(
                 dist,
                 dependency_links
             )
diff --git a/pipenv/vendor/pip9/pep425tags.py b/pipenv/vendor/pip9/pep425tags.py
index 44793b21..f2d65d4c 100644
--- a/pipenv/vendor/pip9/pep425tags.py
+++ b/pipenv/vendor/pip9/pep425tags.py
@@ -159,7 +159,7 @@ def is_manylinux1_compatible():
         pass
 
     # Check glibc version. CentOS 5 uses glibc 2.5.
-    return pip.utils.glibc.have_compatible_glibc(2, 5)
+    return pip9.utils.glibc.have_compatible_glibc(2, 5)
 
 
 def get_darwin_arches(major, minor, machine):
diff --git a/pipenv/vendor/pip9/req/req_file.py b/pipenv/vendor/pip9/req/req_file.py
index 77e51bed..5377cad6 100644
--- a/pipenv/vendor/pip9/req/req_file.py
+++ b/pipenv/vendor/pip9/req/req_file.py
@@ -66,13 +66,13 @@ def parse_requirements(filename, finder=None, comes_from=None, options=None,
     """Parse a requirements file and yield InstallRequirement instances.
 
     :param filename:    Path or url of requirements file.
-    :param finder:      Instance of pip.index.PackageFinder.
+    :param finder:      Instance of pip9.index.PackageFinder.
     :param comes_from:  Origin description of requirements.
     :param options:     cli options.
-    :param session:     Instance of pip.download.PipSession.
+    :param session:     Instance of pip9.download.PipSession.
     :param constraint:  If true, parsing a constraint file rather than
         requirements file.
-    :param wheel_cache: Instance of pip.wheel.WheelCache
+    :param wheel_cache: Instance of pip9.wheel.WheelCache
     """
     if session is None:
         raise TypeError(
@@ -226,7 +226,7 @@ def process_line(line, filename, line_number, finder=None, comes_from=None,
             finder.index_urls = [opts.index_url]
         if opts.use_wheel is False:
             finder.use_wheel = False
-            pip.index.fmt_ctl_no_use_wheel(finder.format_control)
+            pip9.index.fmt_ctl_no_use_wheel(finder.format_control)
         if opts.no_index is True:
             finder.index_urls = []
         if opts.extra_index_urls:
diff --git a/pipenv/vendor/pip9/req/req_install.py b/pipenv/vendor/pip9/req/req_install.py
index 66448166..c6187909 100644
--- a/pipenv/vendor/pip9/req/req_install.py
+++ b/pipenv/vendor/pip9/req/req_install.py
@@ -691,7 +691,7 @@ class InstallRequirement(object):
             paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
 
         elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
-            for path in pip.wheel.uninstallation_paths(dist):
+            for path in pip9.wheel.uninstallation_paths(dist):
                 paths_to_remove.add(path)
 
         elif develop_egg_link:
@@ -845,8 +845,8 @@ class InstallRequirement(object):
                 install_options, global_options, prefix=prefix)
             return
         if self.is_wheel:
-            version = pip.wheel.wheel_version(self.source_dir)
-            pip.wheel.check_compatibility(version, self.name)
+            version = pip9.wheel.wheel_version(self.source_dir)
+            pip9.wheel.check_compatibility(version, self.name)
 
             self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
             self.install_succeeded = True
diff --git a/pipenv/vendor/pip9/utils/deprecation.py b/pipenv/vendor/pip9/utils/deprecation.py
index c3f799e6..42124240 100644
--- a/pipenv/vendor/pip9/utils/deprecation.py
+++ b/pipenv/vendor/pip9/utils/deprecation.py
@@ -42,7 +42,7 @@ def _showwarning(message, category, filename, lineno, file=None, line=None):
     else:
         if issubclass(category, PipDeprecationWarning):
             # We use a specially named logger which will handle all of the
-            # deprecation messages for pip.
+            # deprecation messages for pip9.
             logger = logging.getLogger("pip.deprecations")
 
             # This is purposely using the % formatter here instead of letting
@@ -53,7 +53,7 @@ def _showwarning(message, category, filename, lineno, file=None, line=None):
             # PipDeprecationWarnings that are Pending still have at least 2
             # versions to go until they are removed so they can just be
             # warnings.  Otherwise, they will be removed in the very next
-            # version of pip. We want these to be more obvious so we use the
+            # version of pip9. We want these to be more obvious so we use the
             # ERROR logging level.
             if issubclass(category, Pending):
                 logger.warning(log_message)
diff --git a/pipenv/vendor/pip9/utils/outdated.py b/pipenv/vendor/pip9/utils/outdated.py
index c087312e..0f3eeee3 100644
--- a/pipenv/vendor/pip9/utils/outdated.py
+++ b/pipenv/vendor/pip9/utils/outdated.py
@@ -93,7 +93,7 @@ def load_selfcheck_statefile():
 
 
 def pip_version_check(session):
-    """Check for an update for pip.
+    """Check for an update for pip9.
 
     Limit the frequency of checks to once per week. State is stored either in
     the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
@@ -143,7 +143,7 @@ def pip_version_check(session):
         if (pip_version < remote_version and
                 pip_version.base_version != remote_version.base_version):
             # Advise "python -m pip" on Windows to avoid issues
-            # with overwriting pip.exe.
+            # with overwriting pip9.exe.
             if WINDOWS:
                 pip_cmd = "python -m pip"
             else:
diff --git a/pipenv/vendor/pip9/wheel.py b/pipenv/vendor/pip9/wheel.py
index c9ebbf16..728f5cc0 100644
--- a/pipenv/vendor/pip9/wheel.py
+++ b/pipenv/vendor/pip9/wheel.py
@@ -57,7 +57,7 @@ class WheelCache(object):
         """Create a wheel cache.
 
         :param cache_dir: The root of the cache.
-        :param format_control: A pip.index.FormatControl object to limit
+        :param format_control: A pip9.index.FormatControl object to limit
             binaries being read from the cache.
         """
         self._cache_dir = expanduser(cache_dir) if cache_dir else None
@@ -82,7 +82,7 @@ def _cache_for_link(cache_dir, link):
     a version of 0.0...and if we built and cached a wheel, we'd end up using
     the same wheel even if the source has been edited.
 
-    :param cache_dir: The cache_dir being used by pip.
+    :param cache_dir: The cache_dir being used by pip9.
     :param link: The link of the sdist for which this will cache wheels.
     """
 
@@ -121,7 +121,7 @@ def cached_wheel(cache_dir, link, format_control, package_name):
     if not package_name:
         return link
     canonical_name = canonicalize_name(package_name)
-    formats = pip.index.fmt_ctl_formats(format_control, canonical_name)
+    formats = pip9.index.fmt_ctl_formats(format_control, canonical_name)
     if "binary" not in formats:
         return link
     root = _cache_for_link(cache_dir, link)
@@ -145,7 +145,7 @@ def cached_wheel(cache_dir, link, format_control, package_name):
         return link
     candidates.sort()
     path = os.path.join(root, candidates[0][1])
-    return pip.index.Link(path_to_url(path))
+    return pip9.index.Link(path_to_url(path))
 
 
 def rehash(path, algo='sha256', blocksize=1 << 20):
@@ -768,11 +768,11 @@ class WheelBuilder(object):
                 if autobuilding:
                     link = req.link
                     base, ext = link.splitext()
-                    if pip.index.egg_info_matches(base, None, link) is None:
+                    if pip9.index.egg_info_matches(base, None, link) is None:
                         # Doesn't look like a package - don't autobuild a wheel
                         # because we'll have no way to lookup the result sanely
                         continue
-                    if "binary" not in pip.index.fmt_ctl_formats(
+                    if "binary" not in pip9.index.fmt_ctl_formats(
                             self.finder.format_control,
                             canonicalize_name(req.name)):
                         logger.info(
@@ -828,7 +828,7 @@ class WheelBuilder(object):
                         req.source_dir = req.build_location(
                             self.requirement_set.build_dir)
                         # Update the link for this.
-                        req.link = pip.index.Link(
+                        req.link = pip9.index.Link(
                             path_to_url(wheel_file))
                         assert req.link.is_wheel
                         # extract the wheel into the dir
diff --git a/tasks/vendoring/patches/vendor/pip.patch b/tasks/vendoring/patches/vendor/pip.patch
new file mode 100644
index 00000000..b9a4de4c
--- /dev/null
+++ b/tasks/vendoring/patches/vendor/pip.patch
@@ -0,0 +1,353 @@
+diff --git a/pipenv/vendor/pip9/__init__.py b/pipenv/vendor/pip9/__init__.py
+index 238d791..4e3e530 100644
+--- a/pipenv/vendor/pip9/__init__.py
++++ b/pipenv/vendor/pip9/__init__.py
+@@ -17,7 +17,7 @@ import re
+ # the stderr output) and is just plain annoying in normal usage.  I don't want
+ # to add socks as yet another dependency for pip, nor do I want to allow-stder
+ # in the DEP-8 tests, so just suppress the warning.  pdb tells me this has to
+-# be done before the import of pip.vcs.
++# be done before the import of pip9.vcs.
+ from pip9._vendor.urllib3.exceptions import DependencyWarning
+ warnings.filterwarnings("ignore", category=DependencyWarning)  # noqa
+ 
+@@ -55,7 +55,7 @@ from pip9._vendor.urllib3.exceptions import InsecureRequestWarning
+ # initialising the pip module, "from pip9 import cmdoptions" is recursive
+ # and appears not to work properly in that situation.
+ import pip9.cmdoptions
+-cmdoptions = pip.cmdoptions
++cmdoptions = pip9.cmdoptions
+ 
+ # The version as used in the setup.py and the docs conf.py
+ __version__ = "9.0.3"
+@@ -238,7 +238,7 @@ def main(args=None):
+         sys.exit(1)
+ 
+     # Needed for locale.getpreferredencoding(False) to work
+-    # in pip.utils.encoding.auto_decode
++    # in pip9.utils.encoding.auto_decode
+     try:
+         locale.setlocale(locale.LC_ALL, '')
+     except locale.Error as e:
+diff --git a/pipenv/vendor/pip9/_vendor/__init__.py b/pipenv/vendor/pip9/_vendor/__init__.py
+index aa90315..efe4f53 100644
+--- a/pipenv/vendor/pip9/_vendor/__init__.py
++++ b/pipenv/vendor/pip9/_vendor/__init__.py
+@@ -2,7 +2,7 @@
+ pip._vendor is for vendoring dependencies of pip to prevent needing pip to
+ depend on something external.
+ 
+-Files inside of pip._vendor should be considered immutable and should only be
++Files inside of pip9._vendor should be considered immutable and should only be
+ updated to versions from upstream.
+ """
+ from __future__ import absolute_import
+@@ -13,7 +13,7 @@ import sys
+ 
+ # Downstream redistributors which have debundled our dependencies should also
+ # patch this value to be true. This will trigger the additional patching
+-# to cause things like "six" to be available as pip.
++# to cause things like "six" to be available as pip9.
+ DEBUNDLED = False
+ 
+ # By default, look in this directory for a bunch of .whl files which we will
+diff --git a/pipenv/vendor/pip9/_vendor/re-vendor.py b/pipenv/vendor/pip9/_vendor/re-vendor.py
+index 82c4ef0..5841a2f 100644
+--- a/pipenv/vendor/pip9/_vendor/re-vendor.py
++++ b/pipenv/vendor/pip9/_vendor/re-vendor.py
+@@ -19,7 +19,7 @@ def clean():
+     os.unlink(os.path.join(here, 'six.py'))
+ 
+ def vendor():
+-    pip.main(['install', '-t', here, '-r', 'vendor.txt'])
++    pip9.main(['install', '-t', here, '-r', 'vendor.txt'])
+     for dirname in glob.glob('*.egg-info'):
+         shutil.rmtree(dirname)
+ 
+diff --git a/pipenv/vendor/pip9/basecommand.py b/pipenv/vendor/pip9/basecommand.py
+index 9c4117c..9c8610f 100644
+--- a/pipenv/vendor/pip9/basecommand.py
++++ b/pipenv/vendor/pip9/basecommand.py
+@@ -169,7 +169,7 @@ class Command(object):
+                 ])),
+             },
+             # Disable any logging besides WARNING unless we have DEBUG level
+-            # logging enabled. These use both pip._vendor and the bare names
++            # logging enabled. These use both pip9._vendor and the bare names
+             # for the case where someone unbundles our libraries.
+             "loggers": dict(
+                 (
+diff --git a/pipenv/vendor/pip9/commands/freeze.py b/pipenv/vendor/pip9/commands/freeze.py
+index c93c7c1..5a6deb9 100644
+--- a/pipenv/vendor/pip9/commands/freeze.py
++++ b/pipenv/vendor/pip9/commands/freeze.py
+@@ -67,7 +67,7 @@ class FreezeCommand(Command):
+         self.parser.insert_option_group(0, self.cmd_opts)
+ 
+     def run(self, options, args):
+-        format_control = pip.index.FormatControl(set(), set())
++        format_control = pip9.index.FormatControl(set(), set())
+         wheel_cache = WheelCache(options.cache_dir, format_control)
+         skip = set(stdlib_pkgs)
+         if not options.freeze_all:
+diff --git a/pipenv/vendor/pip9/commands/help.py b/pipenv/vendor/pip9/commands/help.py
+index 702d62a..0c6bf17 100644
+--- a/pipenv/vendor/pip9/commands/help.py
++++ b/pipenv/vendor/pip9/commands/help.py
+@@ -15,7 +15,7 @@ class HelpCommand(Command):
+         from pip9.commands import commands_dict, get_similar_commands
+ 
+         try:
+-            # 'pip help' with no args is handled by pip.__init__.parseopt()
++            # 'pip help' with no args is handled by pip9.__init__.parseopt()
+             cmd_name = args[0]  # the command we need help for
+         except IndexError:
+             return SUCCESS
+diff --git a/pipenv/vendor/pip9/commands/list.py b/pipenv/vendor/pip9/commands/list.py
+index 1a1e601..9f36140 100644
+--- a/pipenv/vendor/pip9/commands/list.py
++++ b/pipenv/vendor/pip9/commands/list.py
+@@ -138,7 +138,7 @@ class ListCommand(Command):
+             warnings.warn(
+                 "The default format will switch to columns in the future. "
+                 "You can use --format=(legacy|columns) (or define a "
+-                "format=(legacy|columns) in your pip.conf under the [list] "
++                "format=(legacy|columns) in your pip9.conf under the [list] "
+                 "section) to disable this warning.",
+                 RemovedInPip10Warning,
+             )
+diff --git a/pipenv/vendor/pip9/commands/uninstall.py b/pipenv/vendor/pip9/commands/uninstall.py
+index 8e5eacb..0346582 100644
+--- a/pipenv/vendor/pip9/commands/uninstall.py
++++ b/pipenv/vendor/pip9/commands/uninstall.py
+@@ -44,7 +44,7 @@ class UninstallCommand(Command):
+ 
+     def run(self, options, args):
+         with self._build_session(options) as session:
+-            format_control = pip.index.FormatControl(set(), set())
++            format_control = pip9.index.FormatControl(set(), set())
+             wheel_cache = WheelCache(options.cache_dir, format_control)
+             requirement_set = RequirementSet(
+                 build_dir=None,
+diff --git a/pipenv/vendor/pip9/download.py b/pipenv/vendor/pip9/download.py
+index 546c792..b212798 100644
+--- a/pipenv/vendor/pip9/download.py
++++ b/pipenv/vendor/pip9/download.py
+@@ -65,7 +65,7 @@ def user_agent():
+     Return a string representing the user agent.
+     """
+     data = {
+-        "installer": {"name": "pip", "version": pip.__version__},
++        "installer": {"name": "pip", "version": pip9.__version__},
+         "python": platform.python_version(),
+         "implementation": {
+             "name": platform.python_implementation(),
+@@ -251,7 +251,7 @@ class SafeFileCache(FileCache):
+         super(SafeFileCache, self).__init__(*args, **kwargs)
+ 
+         # Check to ensure that the directory containing our cache directory
+-        # is owned by the user current executing pip. If it does not exist
++        # is owned by the user current executing pip9. If it does not exist
+         # we will check the parent directory until we find one that does exist.
+         # If it is not owned by the user executing pip then we will disable
+         # the cache and log a warning.
+diff --git a/pipenv/vendor/pip9/locations.py b/pipenv/vendor/pip9/locations.py
+index 868ab6e..e635dd9 100644
+--- a/pipenv/vendor/pip9/locations.py
++++ b/pipenv/vendor/pip9/locations.py
+@@ -19,7 +19,7 @@ USER_CACHE_DIR = appdirs.user_cache_dir("pip")
+ 
+ DELETE_MARKER_MESSAGE = '''\
+ This file is placed here by pip to indicate the source was put
+-here by pip.
++here by pip9.
+ 
+ Once this package is successfully installed this source code will be
+ deleted (unless you remove this file).
+diff --git a/pipenv/vendor/pip9/operations/freeze.py b/pipenv/vendor/pip9/operations/freeze.py
+index 7cc32ad..5e9c6ea 100644
+--- a/pipenv/vendor/pip9/operations/freeze.py
++++ b/pipenv/vendor/pip9/operations/freeze.py
+@@ -45,7 +45,7 @@ def freeze(
+                                             skip=(),
+                                             user_only=user_only):
+         try:
+-            req = pip.FrozenRequirement.from_dist(
++            req = pip9.FrozenRequirement.from_dist(
+                 dist,
+                 dependency_links
+             )
+diff --git a/pipenv/vendor/pip9/pep425tags.py b/pipenv/vendor/pip9/pep425tags.py
+index 44793b2..f2d65d4 100644
+--- a/pipenv/vendor/pip9/pep425tags.py
++++ b/pipenv/vendor/pip9/pep425tags.py
+@@ -159,7 +159,7 @@ def is_manylinux1_compatible():
+         pass
+ 
+     # Check glibc version. CentOS 5 uses glibc 2.5.
+-    return pip.utils.glibc.have_compatible_glibc(2, 5)
++    return pip9.utils.glibc.have_compatible_glibc(2, 5)
+ 
+ 
+ def get_darwin_arches(major, minor, machine):
+diff --git a/pipenv/vendor/pip9/req/req_file.py b/pipenv/vendor/pip9/req/req_file.py
+index 77e51be..5377cad 100644
+--- a/pipenv/vendor/pip9/req/req_file.py
++++ b/pipenv/vendor/pip9/req/req_file.py
+@@ -66,13 +66,13 @@ def parse_requirements(filename, finder=None, comes_from=None, options=None,
+     """Parse a requirements file and yield InstallRequirement instances.
+ 
+     :param filename:    Path or url of requirements file.
+-    :param finder:      Instance of pip.index.PackageFinder.
++    :param finder:      Instance of pip9.index.PackageFinder.
+     :param comes_from:  Origin description of requirements.
+     :param options:     cli options.
+-    :param session:     Instance of pip.download.PipSession.
++    :param session:     Instance of pip9.download.PipSession.
+     :param constraint:  If true, parsing a constraint file rather than
+         requirements file.
+-    :param wheel_cache: Instance of pip.wheel.WheelCache
++    :param wheel_cache: Instance of pip9.wheel.WheelCache
+     """
+     if session is None:
+         raise TypeError(
+@@ -226,7 +226,7 @@ def process_line(line, filename, line_number, finder=None, comes_from=None,
+             finder.index_urls = [opts.index_url]
+         if opts.use_wheel is False:
+             finder.use_wheel = False
+-            pip.index.fmt_ctl_no_use_wheel(finder.format_control)
++            pip9.index.fmt_ctl_no_use_wheel(finder.format_control)
+         if opts.no_index is True:
+             finder.index_urls = []
+         if opts.extra_index_urls:
+diff --git a/pipenv/vendor/pip9/req/req_install.py b/pipenv/vendor/pip9/req/req_install.py
+index 6644816..c618790 100644
+--- a/pipenv/vendor/pip9/req/req_install.py
++++ b/pipenv/vendor/pip9/req/req_install.py
+@@ -691,7 +691,7 @@ class InstallRequirement(object):
+             paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
+ 
+         elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
+-            for path in pip.wheel.uninstallation_paths(dist):
++            for path in pip9.wheel.uninstallation_paths(dist):
+                 paths_to_remove.add(path)
+ 
+         elif develop_egg_link:
+@@ -845,8 +845,8 @@ class InstallRequirement(object):
+                 install_options, global_options, prefix=prefix)
+             return
+         if self.is_wheel:
+-            version = pip.wheel.wheel_version(self.source_dir)
+-            pip.wheel.check_compatibility(version, self.name)
++            version = pip9.wheel.wheel_version(self.source_dir)
++            pip9.wheel.check_compatibility(version, self.name)
+ 
+             self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
+             self.install_succeeded = True
+diff --git a/pipenv/vendor/pip9/utils/deprecation.py b/pipenv/vendor/pip9/utils/deprecation.py
+index c3f799e..4212424 100644
+--- a/pipenv/vendor/pip9/utils/deprecation.py
++++ b/pipenv/vendor/pip9/utils/deprecation.py
+@@ -42,7 +42,7 @@ def _showwarning(message, category, filename, lineno, file=None, line=None):
+     else:
+         if issubclass(category, PipDeprecationWarning):
+             # We use a specially named logger which will handle all of the
+-            # deprecation messages for pip.
++            # deprecation messages for pip9.
+             logger = logging.getLogger("pip.deprecations")
+ 
+             # This is purposely using the % formatter here instead of letting
+@@ -53,7 +53,7 @@ def _showwarning(message, category, filename, lineno, file=None, line=None):
+             # PipDeprecationWarnings that are Pending still have at least 2
+             # versions to go until they are removed so they can just be
+             # warnings.  Otherwise, they will be removed in the very next
+-            # version of pip. We want these to be more obvious so we use the
++            # version of pip9. We want these to be more obvious so we use the
+             # ERROR logging level.
+             if issubclass(category, Pending):
+                 logger.warning(log_message)
+diff --git a/pipenv/vendor/pip9/utils/outdated.py b/pipenv/vendor/pip9/utils/outdated.py
+index c087312..0f3eeee 100644
+--- a/pipenv/vendor/pip9/utils/outdated.py
++++ b/pipenv/vendor/pip9/utils/outdated.py
+@@ -93,7 +93,7 @@ def load_selfcheck_statefile():
+ 
+ 
+ def pip_version_check(session):
+-    """Check for an update for pip.
++    """Check for an update for pip9.
+ 
+     Limit the frequency of checks to once per week. State is stored either in
+     the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
+@@ -143,7 +143,7 @@ def pip_version_check(session):
+         if (pip_version < remote_version and
+                 pip_version.base_version != remote_version.base_version):
+             # Advise "python -m pip" on Windows to avoid issues
+-            # with overwriting pip.exe.
++            # with overwriting pip9.exe.
+             if WINDOWS:
+                 pip_cmd = "python -m pip"
+             else:
+diff --git a/pipenv/vendor/pip9/wheel.py b/pipenv/vendor/pip9/wheel.py
+index c9ebbf1..728f5cc 100644
+--- a/pipenv/vendor/pip9/wheel.py
++++ b/pipenv/vendor/pip9/wheel.py
+@@ -57,7 +57,7 @@ class WheelCache(object):
+         """Create a wheel cache.
+ 
+         :param cache_dir: The root of the cache.
+-        :param format_control: A pip.index.FormatControl object to limit
++        :param format_control: A pip9.index.FormatControl object to limit
+             binaries being read from the cache.
+         """
+         self._cache_dir = expanduser(cache_dir) if cache_dir else None
+@@ -82,7 +82,7 @@ def _cache_for_link(cache_dir, link):
+     a version of 0.0...and if we built and cached a wheel, we'd end up using
+     the same wheel even if the source has been edited.
+ 
+-    :param cache_dir: The cache_dir being used by pip.
++    :param cache_dir: The cache_dir being used by pip9.
+     :param link: The link of the sdist for which this will cache wheels.
+     """
+ 
+@@ -121,7 +121,7 @@ def cached_wheel(cache_dir, link, format_control, package_name):
+     if not package_name:
+         return link
+     canonical_name = canonicalize_name(package_name)
+-    formats = pip.index.fmt_ctl_formats(format_control, canonical_name)
++    formats = pip9.index.fmt_ctl_formats(format_control, canonical_name)
+     if "binary" not in formats:
+         return link
+     root = _cache_for_link(cache_dir, link)
+@@ -145,7 +145,7 @@ def cached_wheel(cache_dir, link, format_control, package_name):
+         return link
+     candidates.sort()
+     path = os.path.join(root, candidates[0][1])
+-    return pip.index.Link(path_to_url(path))
++    return pip9.index.Link(path_to_url(path))
+ 
+ 
+ def rehash(path, algo='sha256', blocksize=1 << 20):
+@@ -768,11 +768,11 @@ class WheelBuilder(object):
+                 if autobuilding:
+                     link = req.link
+                     base, ext = link.splitext()
+-                    if pip.index.egg_info_matches(base, None, link) is None:
++                    if pip9.index.egg_info_matches(base, None, link) is None:
+                         # Doesn't look like a package - don't autobuild a wheel
+                         # because we'll have no way to lookup the result sanely
+                         continue
+-                    if "binary" not in pip.index.fmt_ctl_formats(
++                    if "binary" not in pip9.index.fmt_ctl_formats(
+                             self.finder.format_control,
+                             canonicalize_name(req.name)):
+                         logger.info(
+@@ -828,7 +828,7 @@ class WheelBuilder(object):
+                         req.source_dir = req.build_location(
+                             self.requirement_set.build_dir)
+                         # Update the link for this.
+-                        req.link = pip.index.Link(
++                        req.link = pip9.index.Link(
+                             path_to_url(wheel_file))
+                         assert req.link.is_wheel
+                         # extract the wheel into the dir